2009/7/31 John Green <wpxs...@gmail.com>: > I've been hanging around and reading long enough to understand that when > measuring the differences between oscillators the preferred methods are the > HP 5370A Time difference counter or the dual mixer method. I want to
What's the difference between a HP 5370A and a HP 5372A for this type of measurement? 73, Steve > evaluate some ocxo's and Rb sources against either a Tbolt or Z3801 and I > don't have either method available. What I have used in the past is an HP > Infinium scope with the reference fed to one channel which also provides > sync and the DUT to the other. I have tested 2 ocxos that were so close that > the two waveforms did not move by a detectable amount in a 30 minute period. > I realize that this method will require very long observation times when > looking at more stable sources. I am not looking to get absolute data, just > comparative. Given what I have to work with, is there a better way? I use an > Agilent 89441A Vector Signal Analyzer for signal quality measurements. I can > see 60 Hz sidebands at least 60 or 70 db down and while I can't measure > phase noise, I can tell a clean oscillator from a dirty one. For instance, > there is a world of difference between the signal generated by an HP8920 and > a E4430B. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- Steve Rooke - ZL3TUV & G8KVD A man with one clock knows what time it is; A man with two clocks is never quite sure. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.